The Apex Butte is an
affordable class-AB headphone amplifier built with the same quality design as
the other Apex products. Small in size, it can still deliver a lot of
power to drive virtually any headphones.

The Butte is a
DC-coupled design, so it can deliver bass punch that no cap-coupled amp can
deliver. It has incredibly low distortion and an insanely wide frequency
response. It is very transparent.